[BackgroundSync] Remove BackgroundSyncRegistrationHandle

content/child/background_sync/background_sync_provider.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_H_
 #define CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 35 matching lines @@
 
   // blink::WebSyncProvider implementation
   void registerBackgroundSync(
       const blink::WebSyncRegistration* options,
       blink::WebServiceWorkerRegistration* service_worker_registration,
       bool requested_from_service_worker,
       blink::WebSyncRegistrationCallbacks* callbacks) override;
   void getRegistrations(
       blink::WebServiceWorkerRegistration* service_worker_registration,
       blink::WebSyncGetRegistrationsCallbacks* callbacks) override;
-  // TODO(jkarlin): Rename to releaseRegistrationHandle.
-  void releaseRegistration(int64_t handle_id) override;
-
-  void DuplicateRegistrationHandle(
-      int64_t handle_id,
-      const BackgroundSyncService::DuplicateRegistrationHandleCallback&
-          callback);
 
   // WorkerThread::Observer implementation.
   void WillStopCurrentWorkerThread() override;
 
  private:
   // Callback handlers
   void RegisterCallback(
       scoped_ptr<blink::WebSyncRegistrationCallbacks> callbacks,
       BackgroundSyncError error,
       const SyncRegistrationPtr& options);
   void GetRegistrationsCallback(
       scoped_ptr<blink::WebSyncGetRegistrationsCallbacks> callbacks,
       BackgroundSyncError error,
       const mojo::Array<SyncRegistrationPtr>& registrations);
 
   // Helper method that returns an initialized BackgroundSyncServicePtr.
   BackgroundSyncServicePtr& GetBackgroundSyncServicePtr();
 
   BackgroundSyncServicePtr background_sync_service_;
   scoped_refptr<base::SingleThreadTaskRunner> main_thread_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundSyncProvider);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_BACKGROUND_SYNC_BACKGROUND_SYNC_PROVIDER_H_